The film opens with Florence Cole, the wife of local doctor Julian Cole, handing over money to a man in a mask. When she returns home, Peter Hastings, with whom she is romantically involved, telephones Dr. Cole to say that he and his friend Madeline Tilliard have been poisoned by
strychnine in their drinks. Madeline dies. Peter recovers, and is suspected of Madeline's murder. At Peter's house, Dr Cole finds love letters between Florance and Peter, which confirm his suspicions of an affaire. Florence tells local reporter Dennis Willows that Madeline and an unknown man were blackmailing her. That night Florence takes another payment to the man in mask. She tells the man she recognises him. He strikes her and she falls and dies. Peter's ex-fiancée Sallie sets out to find the male blackmailer. ==Cast==